I'd like to write hard sci-fi, but Greg Egan has set the bar so unbelievably high...

Diaspora is simply brilliant. Starting from the birth of an artificial mind, it blossoms into a breathtaking tale of cosmology, peril, exploration, discovery and meditation on what it means to be sentient. These are recurring themes in his work, but the sheer Matryoshka doll -like scale of Diaspora is awe-inspiring unlike anything else.